Flush-tank siphon.



1, w` BERRY; "FLUSH TANK slPHoN.

APPLicATmN men' JAN. 4, me.

Patented Aug. 7, 1917 Witnesses Inventor Attorn'eys Si 1 PATEN JAMES W. BERRY, or IoWA CITY, IOWA.

FLUSH-TANK SIPHON Specification of Letters Patent.

Patented Aug. *7, 1917.

Application ld January 4, 1916. Serial N o. 70,240.

Iowa City, in the county of Johnson and State of Iowa, have invented a new and useful Flush-Tank Siphon, of which the following is a specification.

The present invention appertains to flush tank siphons, such as are used in Sewage Systems, and the like.

The present invention is an improvement or addition for flush tank siphonsv which are disposed above the floors of the tanks, such as the'siphons displosed in Patent No. 1,128,575 granted February 16, 1915 and in my co-pending application Serial No. 22,168 filed April 17, 1915. Withthe floor Siphons asdisclosed in said patent and application, and others of the Same general construction, it has been found lin practice that when the water level within the tank lowers to such an amount that the siphonic action must be depended upon for the discharge of the remaining water within the tank, the Siphon is notinfrequently broken by air rushing into the Siphon from the sewer, thus leaving the remaining water within the tank. When umn of water within the tank that delivers the water vthrough the Siphon to the sewer,

land when' the water level lowers below the upper portion of the Siphon, the siphonic ac- .tion must be depended upon to carry out the remaining water so that ifthe siphonis broken or destroyed, the remaining water will not be discharged, and this will prove detrimental. This difficulty has been experienced with various types of door siphons, and some are even found to be va failure on account of the air flowing back from the' pipe and destroying'the sisewer into the phonic action.

It is the object of the present invention, to lprovide simple yet effective means for arresting or preventing the flow of airfrom the sewer into the Siphon during the siphonic action of the water, thereby maintaining said siphonic action, and the con- 50- The present Vimprovements can be used with the siphons disclosed in said patent and application, and with kindred other siphons, theJ novelty residing in the .provision of. a trap or sump for the discharge pipe of the Siphon; y

With the foregoing and other objects in `view which will appearas the .description proceeds, the invention resides in the combination and arrangement of parts and in the details. of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can bemade within the scope of what is claimed without v departing from the spirit of the-invention.

The invention is illustrated yin different for-ms in the accompanying drawing, where- 1nzi y i Figure 1 is a'vertical section of a flush tank Siphon somewhat the same as disclosed the improvements assembledtherewith.

Fig. 2 is a horizontal section taken on the line 2 2 of Fig. l. n i f Fig.l 3 is a vertical section illustrating a modification i f j The Siphon illustratednin Fig. 1 is the same Vas that' disclosed in the aforesaid `application SerialkNo. v22,168 and since this siphon is to be taken as typical only, the same need in application Serial'No. 22,168, illustrating not be considered in detail, reference` being had to said application if necessary, andit being understood that the presentl improvementscan be used on various types .of floor siphons with equal propriety, for example,`

the siphon disclosed in the above mentioned Patent, No. 1,128,575 and other kindred siphons.` Generally considering, the siphon -disclosed in Fig. 1 embodies a casting l Seated on the floor of the tank, and havinga chamber 2 closed at the top, and a vertical passage 3, there `being a communicating opening 4 between the lower end of the passage 3 and the lower portion of the chamber 2. Abell 5 is disposed over the casting Y 1and the partition 6 between the chamber 2 and passage 3 carries a U-shaped. relief trap 7 communicating with lthe upper por-I tionof the chamber 2 and the upper end of the. passage 3 and upper portion of the chamber within the bell 5.

application No.22,-168, but briefly considered l:Phe bottom ,plate ofthe casting 1-has an upstanding disis as follows: After the water is discharged from the tank, water remains in the relief trap 7, and in the chamber Q" and passage 3 below the upper end of the discharge pipe 8. As the water level rises within the tank,

the pressure of the column or head of water will force the water up into the bell thus displacing' the air and forcing the air from the bell into the passage 3 and relief trap 7, and before the waterlevel inl the passage 3 reaches the lower end of the partition 6, the Lwater is forced entirely'from the relief 'trap 7, thus allowing the air to escape from the passage 3 and bell 5, and starting the iiow of water through the siphon quickly, the water'flowing out through the discharge pipe 8 to the sewer'by a'gushing action. When the water level in the tank reaches 'the line 00-w in Fig. 1, the siphonic action of the water must be depended upon to carry ofi the remaining water in the tank, and if `the Siphon is broken or destroyed, the water Vthe discharge of the water, thereby avoiding the disruption of the siphonic action, but allowing air tofflow'into the discharge pipe 8 after the water has been discharged, in order that normal conditions will be lresumed in the siphonffor the proper subsequent operation, the operation beingintermittent.

'In carrying out the invention, there is provided a-basin 9 having its rimor edge abutting against or secured tothe bottom vor base of the siphon around the lower portion of theV discharge'pipe v8, and Xone side of the bowl or basin 9 is provided with a lateral outlet 10 for the connection ofthe sewer or pipe 11 into which the water rushes from the siphon'for flushing out the sewer pipe. f The outlet 10 is spaced above-the bottom of the bowl 'or basin, and said basin Ais provided with a chordal partition 13 adjacent to and extending across'said7 outlet, the'lower edge of the partition'being spaced from 'the 'bot- Atom of the `basin and the upper edge of the Vpartition being flush with the upper edge of the basin. Said partition prevents the unrestricted flow of air pas't'it, andthe lower edge portion of the partition depends withinthe trap yor sump provided by the lower portion of the basin in which water collects, thereby providing a water seal normally closing thefopening underneath L4the 'partition. The v discharge pipe S'is located between the partition 13 l:and that-sideof the basin opposite the outlet. The bottomf plate ofthe si'phonse'ats' upon the upper edge of the basin and partition to close the openings between the partition and opposite sides Aof the basin. `The Apartition 13 is provided the pipe 8 is provided after the water has been discharged,'to allow the air to flow into lthe siphon to lill the pipe 8 and upper portion of the chamber 2 for the proper subsequent op- 75 eration ofthe siphon. During the discharge ofthe water, however, the water flowing through the apertureor vent 12 `will effectively close the same to preventA airiflowing from the sewer into the pipe 8, and the water so seal provided by the trap or sump willnaturally prevent airflowing from the Isewer into the lower end of the discharge pipe 8. Consequently, after the water levelvwithin the tank reaches the line -x, so that they siphonic action is started, there is no possibility of sulicient air entering the pipe 8 from the sewer l1, to destroy the siphonic action, and said action'will therefore continueuntil all of the' water is discharged vfrom the tank, with the exception of a small amount below the lower edge of-the'bell 5. By .the provision of theltrap yor sump and air vent, the floor siphon'is'renderedthoroughly effective for its intended purpose, andthe present liinprovements'can be employed in connection with various floor siphons.

Fig. 3 illustrates a modification generally resembling that shown in Fig.' 1, there being a basin 9b having the outlet 10b at' one side, loo and a chordal vertical partition 13b, vwhich is'not provided with the aperture or vent, but which has its lower edge termin-ating just slightly above the horizontal plane of the lowermost portion of the'outlet 10b,l to 105 provide an air vent 12bof relatively small proportions 'above said `horizontal-plane, or the level of the water within the lower portion of the basin 9b, as'indicated indotted lines in Fig. 3. During the discharge of the 11o water, the water in flowing' under the partition 13b will prevent the flow of air froin'the outlet 10b past the ypartition 13b, but when the water is discharged, the water level within the trap or sump will'bel'slightly'be 115 low the -lower edge ofthe partition-13b thereby permitting air to flow from the outlet 10b past'the partition lbinto the siphon.

In each form of the invention, there is yprovided a basin having a water trap or sump between the outlet and lower end of the discharge pipe, and acting as awater seal yfor the lower end of said pipe, there being a restricted air vent above thewater trap or sealestablishing communication'be- 125 tween the outlet and discharge pipe.

- Having thus idescribed the invention, what jis claimed as newy is:

A device of the character described emspaced above the bottom thereof, and a chordal partition adjacent to and extending across said outlet, the lower edge of the partition being spaced from the bottom of the basin and the upper edge of the partition being Hush with the upper edge of the basin, said partition preventing the unrestricted flow of air and having an air vent providing a restricted flow of air fromthe outlet past said partition, and a Siphon having a bottom plate seated upon the upper edges of the basin and its partition to close the openings between the partition and opposite sides of the basin, said bottom plate having a vertical discharge pipe located between said partition and that side of the basin opposite the outlet. V

Intestimon that I claim the foregoing as my own, have lhereto aiixed my signature in the presence of two witnesses.

' JAMES W. BERRY. Witnesses:

FRANC MooN, HENRY G. WALKER.

Copies of this patent `may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

